.head-nav li:nth-child(3) a{border-bottom:2px solid #fff;}

/*banner*/
#ban{position:relative;}
#ban>img{width:100%;}
#ban b{width:100%;height:100%;position:absolute;top:0;left:0;background:rgba(0,0,0,.4);}
#ban .content{position:absolute;width:60%;top:40%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;}
#ban .content p{font-size:2rem;line-height:36px;}
#ban .content .title{font-size:4.8rem;margin:30px 0 50px 0;}
/*content*/
#content{margin-bottom:50px;}
#content .nav{width:100%;background:#002258;text-align:center;}
.fixednav{position:fixed;top:0;left:0;z-index:100;}
#content .nav li{margin:20px 50px;}
#content .nav a{color:#fff;font-size:1.6rem;}
#content .nav a:hover{color:#47a9f4;}
#content .text,#content .img{width:50%;}
#content .text div{width:100%;padding:50px;}
#content .text h3{display:inline-block;border-bottom:1px solid #4e83d9;padding-bottom:10px;margin-bottom:30px;}
#content .text h3 a{font-size:3rem;color:#4e83d9;}
#content .text p a{font-size:1.6rem;color:#333;line-height:30px;}
#content .img img{width:100%;}










/*移动端*/
@media screen and (max-width: 767px){
    /*banner*/
    #ban .content{top:50%;width:80%;}
    #ban .content img{display:none;}
    #ban .content .title{font-size: 2rem;margin: 0 0 20px 0;}
    #ban .content p{font-size: 1.4rem;line-height: 26px;}
    /*内容*/
    #content .text,#content .img{width:100%;}
    #content .nav li{margin:10px;}
    #content .nav a{font-size:1.2rem;}
    #content .text div{padding:20px;}
    #content .text h3{margin-bottom:10px;}
    #content .text h3 a{font-size:2rem;}
    #content .text p a{font-size:1.4rem;}
}